#5375AA
Closest named color: Flat Blue (#3C73A8). oklch(56% 0.092 259), rgb(83, 117, 170).
Aa
White text reads best on this color (4.67:1).
About this color
#5375AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.092 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.026 away. White text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.49:1 |
| White text | 4.67:1 |
Values
| HEX | #5375AA |
| RGB | rgb(83, 117, 170) |
| HSL | hsl(217, 34%, 50%) |
| OKLCH | oklch(56% 0.092 259) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #5375AA | 4.67:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #5375AA | 4.49:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #5375AA text on white | 4.67:1 | AA | Lc 72.4 | Content text, not long reading |
| #5375AA text on black | 4.49:1 | AA large text | Lc -29.3 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DC
oklch(81% 0.041 258.8)
-
Step 400
400
#88A2CA
oklch(70.7% 0.066 258.9)
-
Step 500
500
#6A8BBD
oklch(63.2% 0.085 258.5)
-
Step 600
600 (this color)
#5375AA
oklch(56% 0.092 259)
-
Step 700
700
#426191
oklch(49.1% 0.086 258.9)
-
Step 800
800
#374F76
oklch(42.6% 0.072 259.8)
-
Step 900
900
#30425F
oklch(37.7% 0.055 259.7)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#5375AA with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6079AC | 0.021 |
| Deuteranopia (no green cones) | #5670A9 | 0.014 |
| Tritanopia (no blue cones) | #2A8188 | 0.082 |
| Achromatopsia (no color) | #747474 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5375AA
#5375AA
oklch(56% 0.092 259)
- #916E2F
#916E2F
oklch(56.1% 0.092 79.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #5375AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.026
- Dull Blue #49759C ΔE 0.026
- Stormy Blue #507B9C ΔE 0.032
- Cerulean #457B9D ΔE 0.034
- Muted Blue #3B719F ΔE 0.034
- Steel Blue #4682B4 ΔE 0.037
- French Blue #436BAD ΔE 0.037
- Windows Blue #3778BF ΔE 0.039
Use #5375AA in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.